There are different ways and materials for doing this,but essentially you wasnt to mask the clear panels in order to allow you to paint the frame work. I did a quick series of piccies to show how I do it which I'll post again. This shows the technique,I'd normally take longer and be a bit more precise!!
First stuff your clear part with Blu-Tac or similar,you don't want to crack it.
Next place some tape (I use
Tamiya masking tape) over the panel you want to mask and burnish down into the edges of the framework. I use a wooden cocktail stick as this won't tear the tape or scratch the clear part.
Take a SHARP blade,I always use a new scalpel blade, and carefully cut around the panel using the frame as a guide.
Voila,one masked glass panel. Now all you have to do is repeat for all the others. There's plenty on a Hurricane to keep you busy!
The only real alternatives to masking are to hand paint the frames (good luck) or to use
decals. You can apply coloured strips of decal to the frames. Some kits (Hasegawa Ju87 springs to mind) actually supply these decal strips. I tried them but gave up and masked mine. That says more about me than the
decals lol.
There are other ways of masking,for example laying very thin strips of tape around the edges of the panels and then filling in.
Some people swear by liquid masks. They would apply the liquid to the part either keeping the frames free of mask or carefully removing the dried mask from the frames afterwards. Hopefully someone who uses these techniques will chip in.
Cheers
Steve